On 7/23/2020 12:12 PM, klaus.kragelund@gmail.com wrote:> A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etc >I don't think you're MAN enough to do some research into distributors who carry the correct wire and find some optimum part #s and post those links here.
24V to 500-1000V, 20W floating DC-DC converter
Started by ●July 21, 2020
Reply by ●July 23, 20202020-07-23
Reply by ●July 23, 20202020-07-23
On Thu, 23 Jul 2020 12:00:45 -0400, bitrex <user@example.net> wrote:>On 7/23/2020 11:37 AM, jlarkin@highlandsniptechnology.com wrote: >> On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote: >> >>> On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote: >>>> On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote: >>>> >>>>> On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote: >>>>>> On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote: >>>>>> >>>>>>> On 7/22/2020 5:23 PM, John Larkin wrote: >>>>>>>> On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote: >>>>>>>> >>>>>>>>> On 7/22/2020 10:21 AM, George Herold wrote: >>>>>>>>>> On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote: >>>>>>>>>>> I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter. >>>>>>>>>>> >>>>>>>>>>> My specs are: >>>>>>>>>>> Input: 24-28V >>>>>>>>>>> Output voltage: 500-1000V adjustable via control signal >>>>>>>>>>> Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W) >>>>>>>>>>> >>>>>>>>>>> I've been reading through threads on different HV designs. So far the only one I've come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ >>>>>>>>>>> >>>>>>>>>>> There's also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don't know enough about making it adjustable and isolated. >>>>>>>>>>> >>>>>>>>>>> Thoughts on how to proceed? >>>>>>>>>> >>>>>>>>>> If you are going to try building it yourself, then I'd start with the >>>>>>>>>> 500V 5 mA one first. I built my first flyback with the LT3083, >>>>>>>>>> >>>>>>>>>> (2018... thread here >>>>>>>>>> https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ >>>>>>>>>> >>>>>>>>>> Good luck. Oh buying a ready made HV supply would be a good thing. >>>>>>>>>> Gives you something to compare to if/when you have problems putting >>>>>>>>>> to whole system together. >>>>>>>>>> >>>>>>>>>> George H. >>>>>>>>>> >>>>>>>>> >>>>>>>>> Yep. OP did not like that I disparaged/was skeptical of his plan to >>>>>>>>> build a 20 watt 1000 volt converter out of the gate but it strikes me as >>>>>>>>> a certain kind of madness as a first project if OP has not designed and >>>>>>>>> built a flyback of any type before. >>>>>>>> >>>>>>>> Just different numbers. Shouldn't be really hard. >>>>>>>> >>>>>>> >>>>>>> The Thor rocket was just sort of a scaled-up kerosene burning V2: >>>>>>> >>>>>>> <https://www.youtube.com/watch?v=WYrrVHPur2Y> >>>>>> >>>>>> >>>>>> OK, my bad. It would be really hard for you. >>>>>> >>>>>> >>>>>> >>>>> >>>>> Mooom, Mr. Larkin's trying to peer pressure me again. He say he's bad! >>>>> >>>> >>>> Peer? >>>> >>>> >>>> >>> >>> Sometimes I find the best way to, say, get a friend a second opinion on >>> her car accident situation on the social media for example. Look at the >>> pictures. Say "Sigh, yep, looks like $6000 worth of damage to me. Maybe >>> $7000. I think they're probably going to rule that a total loss.." >>> >>> then you wait a little bit. And another man (almost always a man) will >>> come around and say "Nah idiot. That's no more than $3000 in damage. >>> Actually I worked for the insurance industry for 8 years and DO know >>> what I'm talking about, unlike you." >>> >>> "No way that's not a total loss." >>> >>> "Oh I beg to differ!" >>> >>> "There is definitely, no way, that you could provide an itemized >>> assessment of all the damage to that car and what you believe the repair >>> costs should be and have that on my friend's desk by tomorrow morning." >>> >>> "PFft! I could do it in my sleep." "Oh yeah?" "Yeah, punk." "OK. Well >>> get on it." "Right. I'll show you." >>> >>> I am studying managerial techniques >>> >> >> If your contribution to an electronic design forum is to tell >> obviously intelligent people that they shouldn't try to design >> electronics, management is your destiny. You can write long memos just >> like the blather above. >> >> A 1KV, 20 watt flyback wouldn't be difficult, except to people who are >> afraid to do it. >> >> > >Pfft. No way you could design him a circuit like that by the weekend. >You ain't got the guts!I do HV flybacks all the time. I've posted several here. I'll sim and build another one this week if my customer can decide what he really needs. Any decent analog designer could Spice this in an houror two; I could do it in 20 minutes, but I'm familiar with the part. All of the LT3083 boosts and flybacks that I've simulated have worked as expected. My only problem has been inductor heating, which won't be an issue here with the recommended transformer. If he wants to scribble or Spice a circuit, I offered to help. I'm sure MPS would help too. You wouldn't try it, would you? Do it. Post it. -- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
Reply by ●July 23, 20202020-07-23
On Thu, 23 Jul 2020 09:12:11 -0700 (PDT), klaus.kragelund@gmail.com wrote:>A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etcThe transformer that I suggested should just work. Why wind transformers that are already stocked and available as samples? The only interesting issue will be getting feedback from the isolated side. That might be done by inference on the low side (as I posted recently), or optocoupling, or a high-side regulator. -- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
Reply by ●July 23, 20202020-07-23
On 7/23/2020 12:31 PM, jlarkin@highlandsniptechnology.com wrote:> On Thu, 23 Jul 2020 12:00:45 -0400, bitrex <user@example.net> wrote: > >> On 7/23/2020 11:37 AM, jlarkin@highlandsniptechnology.com wrote: >>> On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote: >>> >>>> On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote: >>>>> On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote: >>>>> >>>>>> On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote: >>>>>>> On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote: >>>>>>> >>>>>>>> On 7/22/2020 5:23 PM, John Larkin wrote: >>>>>>>>> On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote: >>>>>>>>> >>>>>>>>>> On 7/22/2020 10:21 AM, George Herold wrote: >>>>>>>>>>> On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote: >>>>>>>>>>>> I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter. >>>>>>>>>>>> >>>>>>>>>>>> My specs are: >>>>>>>>>>>> Input: 24-28V >>>>>>>>>>>> Output voltage: 500-1000V adjustable via control signal >>>>>>>>>>>> Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W) >>>>>>>>>>>> >>>>>>>>>>>> I've been reading through threads on different HV designs. So far the only one I've come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ >>>>>>>>>>>> >>>>>>>>>>>> There's also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don't know enough about making it adjustable and isolated. >>>>>>>>>>>> >>>>>>>>>>>> Thoughts on how to proceed? >>>>>>>>>>> >>>>>>>>>>> If you are going to try building it yourself, then I'd start with the >>>>>>>>>>> 500V 5 mA one first. I built my first flyback with the LT3083, >>>>>>>>>>> >>>>>>>>>>> (2018... thread here >>>>>>>>>>> https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ >>>>>>>>>>> >>>>>>>>>>> Good luck. Oh buying a ready made HV supply would be a good thing. >>>>>>>>>>> Gives you something to compare to if/when you have problems putting >>>>>>>>>>> to whole system together. >>>>>>>>>>> >>>>>>>>>>> George H. >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> Yep. OP did not like that I disparaged/was skeptical of his plan to >>>>>>>>>> build a 20 watt 1000 volt converter out of the gate but it strikes me as >>>>>>>>>> a certain kind of madness as a first project if OP has not designed and >>>>>>>>>> built a flyback of any type before. >>>>>>>>> >>>>>>>>> Just different numbers. Shouldn't be really hard. >>>>>>>>> >>>>>>>> >>>>>>>> The Thor rocket was just sort of a scaled-up kerosene burning V2: >>>>>>>> >>>>>>>> <https://www.youtube.com/watch?v=WYrrVHPur2Y> >>>>>>> >>>>>>> >>>>>>> OK, my bad. It would be really hard for you. >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> Mooom, Mr. Larkin's trying to peer pressure me again. He say he's bad! >>>>>> >>>>> >>>>> Peer? >>>>> >>>>> >>>>> >>>> >>>> Sometimes I find the best way to, say, get a friend a second opinion on >>>> her car accident situation on the social media for example. Look at the >>>> pictures. Say "Sigh, yep, looks like $6000 worth of damage to me. Maybe >>>> $7000. I think they're probably going to rule that a total loss.." >>>> >>>> then you wait a little bit. And another man (almost always a man) will >>>> come around and say "Nah idiot. That's no more than $3000 in damage. >>>> Actually I worked for the insurance industry for 8 years and DO know >>>> what I'm talking about, unlike you." >>>> >>>> "No way that's not a total loss." >>>> >>>> "Oh I beg to differ!" >>>> >>>> "There is definitely, no way, that you could provide an itemized >>>> assessment of all the damage to that car and what you believe the repair >>>> costs should be and have that on my friend's desk by tomorrow morning." >>>> >>>> "PFft! I could do it in my sleep." "Oh yeah?" "Yeah, punk." "OK. Well >>>> get on it." "Right. I'll show you." >>>> >>>> I am studying managerial techniques >>>> >>> >>> If your contribution to an electronic design forum is to tell >>> obviously intelligent people that they shouldn't try to design >>> electronics, management is your destiny. You can write long memos just >>> like the blather above. >>> >>> A 1KV, 20 watt flyback wouldn't be difficult, except to people who are >>> afraid to do it. >>> >>> >> >> Pfft. No way you could design him a circuit like that by the weekend. >> You ain't got the guts! > > I do HV flybacks all the time. I've posted several here. I'll sim and > build another one this week if my customer can decide what he really > needs.I'm not entirely convinced OP knows what he needs either, charging up a 5uF cap bank to 1kV for a piezo driver? sure love to know what the application is.> Any decent analog designer could Spice this in an houror two; I could > do it in 20 minutes, but I'm familiar with the part. All of the LT3083 > boosts and flybacks that I've simulated have worked as expected. My > only problem has been inductor heating, which won't be an issue here > with the recommended transformer. > > If he wants to scribble or Spice a circuit, I offered to help. I'm > sure MPS would help too. > > You wouldn't try it, would you? Do it. Post it. > >Not particularly, as you say you're the man for the job. I'm just providing suitable encouragement. Can't wait to see it up and running on a sheet of copper clad and your measurements on it - it's going to be great!
Reply by ●July 23, 20202020-07-23
On Thursday, July 23, 2020 at 11:31:26 AM UTC-5, jla...@highlandsniptechnology.com wrote:> Any decent analog designer could Spice this in an houror two; I could > do it in 20 minutes, but I'm familiar with the part. All of the LT3083 > boosts and flybacks that I've simulated have worked as expected. My > only problem has been inductor heating, which won't be an issue here > with the recommended transformer. > > If he wants to scribble or Spice a circuit, I offered to help. I'm > sure MPS would help too.I'll be taking you up on that offer. Hopefully I can get around to the design this weekend. On Thursday, July 23, 2020 at 11:54:02 AM UTC-5, bitrex wrote:> I'm not entirely convinced OP knows what he needs either, charging up a > 5uF cap bank to 1kV for a piezo driver? sure love to know what the > application is.Fortunately I do know what I need. Your assumptions, insinuations and trolling throughout this thread is unwarranted. You are focused entirely too much on the bypass capacitors. The necessary information is that I have a load that needs 20W at 1000V.
Reply by ●July 23, 20202020-07-23
On Thu, 23 Jul 2020 12:53:57 -0400, bitrex <user@example.net> wrote:>On 7/23/2020 12:31 PM, jlarkin@highlandsniptechnology.com wrote: >> On Thu, 23 Jul 2020 12:00:45 -0400, bitrex <user@example.net> wrote: >> >>> On 7/23/2020 11:37 AM, jlarkin@highlandsniptechnology.com wrote: >>>> On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote: >>>> >>>>> On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote: >>>>>> On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote: >>>>>> >>>>>>> On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote: >>>>>>>> On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote: >>>>>>>> >>>>>>>>> On 7/22/2020 5:23 PM, John Larkin wrote: >>>>>>>>>> On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote: >>>>>>>>>> >>>>>>>>>>> On 7/22/2020 10:21 AM, George Herold wrote: >>>>>>>>>>>> On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote: >>>>>>>>>>>>> I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter. >>>>>>>>>>>>> >>>>>>>>>>>>> My specs are: >>>>>>>>>>>>> Input: 24-28V >>>>>>>>>>>>> Output voltage: 500-1000V adjustable via control signal >>>>>>>>>>>>> Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W) >>>>>>>>>>>>> >>>>>>>>>>>>> I've been reading through threads on different HV designs. So far the only one I've come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ >>>>>>>>>>>>> >>>>>>>>>>>>> There's also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don't know enough about making it adjustable and isolated. >>>>>>>>>>>>> >>>>>>>>>>>>> Thoughts on how to proceed? >>>>>>>>>>>> >>>>>>>>>>>> If you are going to try building it yourself, then I'd start with the >>>>>>>>>>>> 500V 5 mA one first. I built my first flyback with the LT3083, >>>>>>>>>>>> >>>>>>>>>>>> (2018... thread here >>>>>>>>>>>> https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ >>>>>>>>>>>> >>>>>>>>>>>> Good luck. Oh buying a ready made HV supply would be a good thing. >>>>>>>>>>>> Gives you something to compare to if/when you have problems putting >>>>>>>>>>>> to whole system together. >>>>>>>>>>>> >>>>>>>>>>>> George H. >>>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> Yep. OP did not like that I disparaged/was skeptical of his plan to >>>>>>>>>>> build a 20 watt 1000 volt converter out of the gate but it strikes me as >>>>>>>>>>> a certain kind of madness as a first project if OP has not designed and >>>>>>>>>>> built a flyback of any type before. >>>>>>>>>> >>>>>>>>>> Just different numbers. Shouldn't be really hard. >>>>>>>>>> >>>>>>>>> >>>>>>>>> The Thor rocket was just sort of a scaled-up kerosene burning V2: >>>>>>>>> >>>>>>>>> <https://www.youtube.com/watch?v=WYrrVHPur2Y> >>>>>>>> >>>>>>>> >>>>>>>> OK, my bad. It would be really hard for you. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> Mooom, Mr. Larkin's trying to peer pressure me again. He say he's bad! >>>>>>> >>>>>> >>>>>> Peer? >>>>>> >>>>>> >>>>>> >>>>> >>>>> Sometimes I find the best way to, say, get a friend a second opinion on >>>>> her car accident situation on the social media for example. Look at the >>>>> pictures. Say "Sigh, yep, looks like $6000 worth of damage to me. Maybe >>>>> $7000. I think they're probably going to rule that a total loss.." >>>>> >>>>> then you wait a little bit. And another man (almost always a man) will >>>>> come around and say "Nah idiot. That's no more than $3000 in damage. >>>>> Actually I worked for the insurance industry for 8 years and DO know >>>>> what I'm talking about, unlike you." >>>>> >>>>> "No way that's not a total loss." >>>>> >>>>> "Oh I beg to differ!" >>>>> >>>>> "There is definitely, no way, that you could provide an itemized >>>>> assessment of all the damage to that car and what you believe the repair >>>>> costs should be and have that on my friend's desk by tomorrow morning." >>>>> >>>>> "PFft! I could do it in my sleep." "Oh yeah?" "Yeah, punk." "OK. Well >>>>> get on it." "Right. I'll show you." >>>>> >>>>> I am studying managerial techniques >>>>> >>>> >>>> If your contribution to an electronic design forum is to tell >>>> obviously intelligent people that they shouldn't try to design >>>> electronics, management is your destiny. You can write long memos just >>>> like the blather above. >>>> >>>> A 1KV, 20 watt flyback wouldn't be difficult, except to people who are >>>> afraid to do it. >>>> >>>> >>> >>> Pfft. No way you could design him a circuit like that by the weekend. >>> You ain't got the guts! >> >> I do HV flybacks all the time. I've posted several here. I'll sim and >> build another one this week if my customer can decide what he really >> needs. > >I'm not entirely convinced OP knows what he needs either, charging up a >5uF cap bank to 1kV for a piezo driver? sure love to know what the >application is. > >> Any decent analog designer could Spice this in an houror two; I could >> do it in 20 minutes, but I'm familiar with the part. All of the LT3083 >> boosts and flybacks that I've simulated have worked as expected. My >> only problem has been inductor heating, which won't be an issue here >> with the recommended transformer. >> >> If he wants to scribble or Spice a circuit, I offered to help. I'm >> sure MPS would help too. >> >> You wouldn't try it, would you? Do it. Post it. >> >> > >Not particularly, as you say you're the man for the job. I'm just >providing suitable encouragement. Can't wait to see it up and running on >a sheet of copper clad and your measurements on it - it's going to be great!OK, you're not MAN enough to approach a thousand volts. Even in simulation. You might get shocked and frightened and stuff. Post Traumatic Spice Disorder. If I do the HV pulser for this customer, I will certainly post pics. I've posted lots of such things before. https://www.dropbox.com/sh/xvpt3fe4plq26nf/AADeGU747QNvKbcQVxU6a0vTa?dl=0 (The best are proprietary)
Reply by ●July 23, 20202020-07-23
On 2020-07-23 13:14, Matt B wrote:> On Thursday, July 23, 2020 at 11:31:26 AM UTC-5, > jla...@highlandsniptechnology.com wrote: >> Any decent analog designer could Spice this in an houror two; I >> could do it in 20 minutes, but I'm familiar with the part. All of >> the LT3083 boosts and flybacks that I've simulated have worked as >> expected. My only problem has been inductor heating, which won't be >> an issue here with the recommended transformer. >> >> If he wants to scribble or Spice a circuit, I offered to help. I'm >> sure MPS would help too. > > I'll be taking you up on that offer. Hopefully I can get around to > the design this weekend. > > > On Thursday, July 23, 2020 at 11:54:02 AM UTC-5, bitrex wrote: >> I'm not entirely convinced OP knows what he needs either, charging >> up a 5uF cap bank to 1kV for a piezo driver? sure love to know what >> the application is. > > Fortunately I do know what I need. Your assumptions, insinuations and > trolling throughout this thread is unwarranted. You are focused > entirely too much on the bypass capacitors. The necessary information > is that I have a load that needs 20W at 1000V. >With that sort of attitude, everybody will be lining up to give you free help, for sure. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by ●July 23, 20202020-07-23
On Thu, 23 Jul 2020 10:14:28 -0700 (PDT), Matt B <matt.blessinger@gmail.com> wrote:>On Thursday, July 23, 2020 at 11:31:26 AM UTC-5, jla...@highlandsniptechnology.com wrote: >> Any decent analog designer could Spice this in an houror two; I could >> do it in 20 minutes, but I'm familiar with the part. All of the LT3083 >> boosts and flybacks that I've simulated have worked as expected. My >> only problem has been inductor heating, which won't be an issue here >> with the recommended transformer. >> >> If he wants to scribble or Spice a circuit, I offered to help. I'm >> sure MPS would help too. > >I'll be taking you up on that offer. Hopefully I can get around to the design this weekend.Cool. Group designs are fun. We rarely do that here. You'll need a model of the transformer, magnetizing and leakage inductance and maybe some capacitances. Those are easy to approximate.
Reply by ●July 23, 20202020-07-23
On 7/23/2020 2:32 PM, Phil Hobbs wrote:> On 2020-07-23 13:14, Matt B wrote: >> On Thursday, July 23, 2020 at 11:31:26 AM UTC-5, >> jla...@highlandsniptechnology.com wrote: >>> Any decent analog designer could Spice this in an houror two; I >>> could do it in 20 minutes, but I'm familiar with the part. All of >>> the LT3083 boosts and flybacks that I've simulated have worked as >>> expected. My only problem has been inductor heating, which won't be >>> an issue here with the recommended transformer. >>> >>> If he wants to scribble or Spice a circuit, I offered to help. I'm >>> sure MPS would help too. >> >> I'll be taking you up on that offer. Hopefully I can get around to >> the design this weekend. >> >> >> On Thursday, July 23, 2020 at 11:54:02 AM UTC-5, bitrex wrote: >>> I'm not entirely convinced OP knows what he needs either, charging >>> up a 5uF cap bank to 1kV for a piezo driver? sure love to know what >>> the application is. >> >> Fortunately I do know what I need. Your assumptions, insinuations and >> trolling throughout this thread is unwarranted. You are focused >> entirely too much on the bypass capacitors. The necessary information >> is that I have a load that needs 20W at 1000V. >> > > With that sort of attitude, everybody will be lining up to give you free > help, for sure. > > Cheers > > Phil Hobbs >I may not be the top engineer on the planet, but I am pretty good at spotting His Majesty and letting someone else handle him.
Reply by ●July 23, 20202020-07-23
On 7/23/2020 1:14 PM, Matt B wrote:> On Thursday, July 23, 2020 at 11:31:26 AM UTC-5, jla...@highlandsniptechnology.com wrote: >> Any decent analog designer could Spice this in an houror two; I could >> do it in 20 minutes, but I'm familiar with the part. All of the LT3083 >> boosts and flybacks that I've simulated have worked as expected. My >> only problem has been inductor heating, which won't be an issue here >> with the recommended transformer. >> >> If he wants to scribble or Spice a circuit, I offered to help. I'm >> sure MPS would help too. > > I'll be taking you up on that offer. Hopefully I can get around to the design this weekend. > > > On Thursday, July 23, 2020 at 11:54:02 AM UTC-5, bitrex wrote: >> I'm not entirely convinced OP knows what he needs either, charging up a >> 5uF cap bank to 1kV for a piezo driver? sure love to know what the >> application is. > > Fortunately I do know what I need. Your assumptions, insinuations and trolling throughout this thread is unwarranted. You are focused entirely too much on the bypass capacitors. The necessary information is that I have a load that needs 20W at 1000V. >Look pal, if you want to learn about flyback converters, fine. If you know exactly what you need and want it designed and built to your precise spec consider hiring an engineer to do it. Or go to a Burger King if you just want to give orders. Screening out arrogant asses who don't even understand the (hazardous!) circuits they're posting but want to play with even bigger toys is 100% good policy. If someone else wants to take you on for free I'm 100% happy for them to do that.
